<template>
    <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认" 
        v-model.trim="iptValue" @keyup.enter="handleKeyup"/>
    </div>
</template>

<script>
    export default {
        name:"TodoHeader",
        data(){
          return {
            iptValue:"",
          }
        },
        props:{
          addList: {
            type: Function,
            required: true,
          },
        },
        methods: {
          // 定义事件
          handleKeyup(){
            if(!this.iptValue){
              return;
            }
            this.addList(this.iptValue);
            this.iptValue = "";
          }
        }
    }
</script> 

<style>
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}   
</style>